How do I use Christmas rapping paper for the porch?

You could wrap your front door like a gift!

If you have columns, you can wrap them with wrapping paper. You can also wrap your front door.

Rapper Paper, so many jokes, so little time...

You need to give it a Sturdy foundation like Cardboard. After you do that you may want to make it more permanent and enduring with a coat of flexseal clear.

I would wrap some boxes up like presents (make sure you weigh them down) and stack 3 of them on each side of your door or down the steps leading up to your door.

If you do decide to use wrapping paper to decorate parts of your porch, I would suggest using multiple layers for strength. Inexpensive rolls of gift wrapping paper are notoriously thin and rip very easily.